Variable-speed transmission.



E. G, STAUDE.

VARIABLE SPEED TRANSMISSION.

APPLICATION FILED MN- 26. I911.

Patented-July 25, 1916.

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VARIABLE SP EED TRANSMISSION. APPLICATION FILED JAN-26. 1911.

1,192,580. Patented July 25,1916.

3 SHEETS-SHEET 2- IW/TNES SE5 W .0 W//\/ G; S THU/)5 //v VE/V TOR EDWINGUSTAVE STAUDE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO E. G. STAUDEMANUFAC'JJULIEtINGrv 00., OF MINNEAPOLIS, MINNESOTA, A CORPORATION.

VARIABLE-SPEED TRANSMISSION.

Application filed January 26, 1911.

To all whom it may concern.

Be it known that I, EDWIN G. STAUDE, of Minneapolis, Hennepin county,Minnesota, have invented certain new and useful Improvements inVariable-Speed Transmission, of which the following is a specification.

The primary object of my invention is to provide" a positive variablespeed friction clutch transmission which shall be a direct drive on highspeed.

A further object is to provide a speed controlling mechanism, whichshall not act as a power transmitter, but, positively govern the speedof the driven member.

A further object is to provide a construction which shall be simple andcompact as well as highly efficient in the economical transmission ofpower.

The invention consists generally in various constructions andcombinations, all as hereinafter described and particularly pointed outin the claims.

In the accompanying drawings forming part of this specification, Figure1 is a. vertical section of the variable speed transmission embodying myinvention, Fig. 2 is a vertical section on the line wm of Fig. 1,looking in the direction of the arrow, Fig. 3 is a horizontal section onthe line y3 of Fig. 1 looking in the direction of the arrow, Figs. 4 and5 are details of the speed controlling mechanism.

As shown in the drawing, 2 represents a bracket or base for supportingthe speed controlling mechanism having a bearing at 3 for supporting theshaft 4 of the driving member 5. The disk 6 is arranged concentric tothe bearing 3 and for convenience in manufacture, I have shown this diskprovided with a hub 7 which is pressed into place and rigidly secured tothe frame 2 and forms the bearing 3. Mounted on the bearings 8 and 9 isa shaft 10 having a ball bearing collar 11. The'bearings 8 and 9 areadjusted by suitable blind set screws 12 and 13. Mounted on the shaft 10is a wheel 14, which operates on the surface of the disk and is arrangedby a suitable spline to slide in the key-way 15 on the shaft 10. A bellcrank 16 is pivoted at 17 and has an operative connection with thegroove 18 on Specification of Letters Patent.

Patented July 25, 1916.

Serial No. 604,820.

the wheel 14 and is adjusted to the required position by means of acollar 19 having the usual controlling lever consisting of a fork 20adapted to operate in the groove 21 in the usual manner. Pins 22 projectthrough a slot 23 of the driven member 24 and operate in a groove 25 onthe rod 26, which is fastened to the short arm of the bell crank 16.

From the construction just described, the movement of the collar towardand from the transmission will operate the controlling wheel 14 towardand away from the center of the transmission.

Mounted on one end of the shaft 10 is a bevel gear 27 meshing intoanother bevel gear 28, which is formed integral with the driven member24. lhe bevel gear 27 has a sleeve 29 to give sufficient bearing surfacefor the gear, and mounted over the sleeve is a sliding member 30 havingrollers 31 adapted to operate against the inclined surfaces 32 of thecollar 33, secured to the shaft 10 in any desirable manner. A spring 34holds the member 30 containing the rollers 31 firmly against the collar33. A

lever 35 is pivoted at 36 on the driving member and has a fork 37 androllers 38 adapted to operate in an annular groove 39 on the member 30.The opposite end of the lever 35 has a projection 36 and lugs 37 towhich are pivoted adjustable connecting rods 38'. The connecting rods 38have arms 39 and are connected by a spring 40. The opposite ends of theconnecting rods 38 are pivoted at a point 41 to the friction clutchshoes 42. These shoes are pivoted at a point 43 on the driving member 5and operate against surfaces 44 on the driven member 24.

For convenience in assembling, the driving member 5 is composed of parts45 and 46, shown in Fig. 3, and these parts are secured to each other bycap screws 47. The various pivots and projections, such as the pivots 43for the shoes and the pivot 36 for the lever 35 and the bearings for thepivot 17 are cast integral with the member 46. An annular projection 48,which centers as well as acts as a bearing for the member 49, is formedon the part 46. This member 49 has a concentric surface 50, whichoperates in a bearing 51 supported from the bracket 2.

Power may be transmitted from the driven member through the shaft 24,or, I may apply a belt on the surface'52 of the member 49. I have showna construction wherein the driving member is driven by a belt operatingon the surface 53 of the driving member 5. Ido not, however, confinemyself to this method of driving as I may extend the shaft 4 and usethat as a means for driving the driving member.

I have shown a 'slot 54 through controlling wheel 14 operates on thesurface 6 of the disk; but it is evident that I may modify thisconstruction in various ways.

The operation of the mechanism is as follows: The belt is applied to thesurface 53 on the driving member which revolves in the.

bearings3 and 48. The driven member being stationary, it. follows thatthe bevel gear 27 must revolve about its axis, belng driven by the gear28. The member 30 is splined on thesleeve 29 of the gear 27 andpermitted to slide thereon but will revolve with the gear 27 and if thecontrolling wheel 14 is moved out to the edge of the disk 6, it willrevolve at the same speed that the gear 27 revolves and allow the clutchmechanism, consisting of the shoes 42 and the surfaces 44, to remaininoperative and therefore a will not revolve the driven member. As soonas the controlling wheel 14 is moved toward the center of the disk 6, itwill not revolve as fast as the gear 27 must revolve in order to allowthe driven member to remain stationary. This will cause the rollers 31to run up the in-- cline 32 on the collar 33 and force the member 30toward the gear 27 against the, tension of the spring 34, which willmove the lever 35 in a direction that will cause the projection with thelugs 37 to force the pivots 41 apart by means of the connecting rods 38,acting as a toggle lever.; The

shoes 42 being expanded will cause a fricling wheel 14 operating at agiven speed, which is slower than the initial speed of the gear 27, willdrive the, collar 33 and cause the rollers 31 to comedown the incline ofthe surface 32 on the collar 33. This action would tend to release theclutch. members again and, allow the member 49 to remain stationary. Therollers 31 will adjust themselves at a certain position on the inclinedsurface 32 where they will carry the-load at which the a continuousspeed, regulated by the posi* tion of the controlling wheel 14. When thecontrolling wheel is moved into the position shown in Fig. 1, it ismoved off from the surface 6 on the moving surface 55, which is part ofthe driving member 5, and in this position there is no movement of thecontrolling wheel 14, and the result is that the rollers 31 willrun upthe incline 32 on the collar 33 until the shoes 42 aresecurely set onthe surfaces 44 of the driven member 49. The more load applied to thedriven means having a friction surface for said wheel, gears interposedbetween said shaft and said driven member, said shaft gear revolvingloosely on said shaft, and mechanism actuated by the relative rotationof said shaft and gear for connecting said driving and driven members.

2. The combination, with a driving mem ber and a friction disk, of anormally stationary driven member having a gear, a shaft mountedtransversely of said driving member, a friction wheel splined on saidshaft and arranged to contact with said disk, a gear loosely mounted onsaid shaft and meshing with said driven member gear, and mechanismactuated by the relative rotation of said shaft and gear for connectingsaid driving and driven members.

3. The combination, with a driving member, of a normally stationarydriven member, a shaft mounted to revolve with said driving member, adisk having a friction surface, a friction wheel splined on said shaftand arranged to contact with said driving member, and with said disk, acollar having an inclined surface mounted on said shaft, a sleeveslidable on said shaft and having anti-friction wheels to engage1,192,580 &

volving said shaft at a variable speed, said In Witness whereof, I havehereunto set actililating means being adjustable bradiallg my hand this17 day of January 1911. Wit respect to sai rivin mem er, an

mechanism, including a c1uth member, ac- EDWIN GUSTAVE STAUDE' tuated bythe relative rotation of said shaft Witnesses:

and its gear for operatively connecting said GENEVIEVE E. SoRENsEN,

driving and said driven members. EDWARD A. PAUL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C. v

